Kathleen, Age Seven, Holds the Small Ball in Both Hands

Kathleen, age seven, holds the small ball in both hands in front of her before swinging forward, then backward with one hand and balancing on well-separated feet. As her arm swings forward and across her body, she rotates and leans into the throw. She moves the foot from the back to a forward position as she follows through the body movement and maintains her balance. What word best describes this movement?

A) Bilateral
B) Ipsilateral
C) Unilateral
D) Contralateral